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Not in CISA KEV
HIGH severity

CVE-2020-14326 — resteasy-bom

HIGHFix: resteasy/Resteasy#2471

CVE-2020-14326 is a high-severity (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in org.jboss.resteasy:resteasy-bom. A fix is available for org.jboss.resteasy:resteasy-bom — see the affected versions and patch details below.

RESTEasy 4.5.5.Final in hash flooding

Also known asGHSA-37g7-8vjj-pjpj
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs69th percentile — riskier than 69% of all scored CVEsHighest risk
0.00%0.58%1.16%1.75%0.5%1.2%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
☕org.jboss.resteasy:resteasy-bom

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

A vulnerability was found in RESTEasy, where RootNode incorrectly caches routes. This issue results in hash flooding, leading to slower requests with higher CPU time spent searching and adding the entry. This flaw allows an attacker to cause a denial of service.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.jboss.resteasy:resteasy-bomall versions4.5.6.Finalorg.jboss.resteasy:resteasy-bom:4.5.6.Final

Affected Products

3 products · 3 configurations
Application
oncommand insightnetapp
all
Application
integration camel kredhat
all
Application
resteasyredhat
≥ 4.2.0 && < 4.5.6
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jboss.resteasy:resteasy-bom, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.jboss.resteasy:resteasy-bom to 4.5.6.Final or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-14326 is resolved across your whole dependency graph.

  3. Workarounds

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatImportant
ProductFixed inAdvisory
Red Hat build of Quarkus 1.3.4 SP1resteasyRHSA-2020:3248
Red Hat Fuse 7.8.0RESTEasyRHSA-2020:5568
Red Hat IntegrationresteasyRHSA-2021:4918
Red Hat Integration Camel Quarkus 2see advisoryRHSA-2021:4767

Frequently Asked Questions

A vulnerability was found in RESTEasy, where RootNode incorrectly caches routes. This issue results in hash flooding, leading to slower requests with higher CPU time spent searching and adding the entry. This flaw allows an attacker to cause a denial of service.
O3 Security · Impact-Aware SCA

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CVE-2020-14326: resteasy-bom DoS — Fixed in 4.5.6.Final